This fuel is 50% plastic — and it’s slipping through a loophole in international waste law

From the linked article (emphasis mine):

"Every year, an unknown but potentially large amount of plastic waste continues to be traded in the form of “refuse-derived fuel,” or RDF, ground-up packaging and industrial plastic waste that gets mixed with scrap wood and paper in order to be burned for energy."

Now do it industrially and filter the output entirely.